Where Cobb Water Collects Payments

Cobb County Water System accepts payments through several channels, and the method you choose affects when your payment posts and how quickly your account updates. The utility operates payment collection through its own billing office, third-party processors, and automated systems — each with different hours and processing speeds.

You can pay in person at the Cobb County Water System office located in Marietta, by mail to their lockbox address (listed on your bill), online through their website, by phone, or through automatic bank draft. Each route has different cutoff times for same-day posting, and some routes charge fees while others do not.

Key Takeaways

  • Online and phone payments through Cobb Water's official channels post within one to two business days and carry no fee.
  • Mail payments take seven to ten business days to reach the lockbox and post, so send them well before your due date to avoid late fees.
  • Automatic bank draft (ACH) is the fastest and most reliable method, pulling funds directly from your account on or near your due date.
  • In-person payments at the Marietta office post the same day if made before 4:30 p.m., but the office is closed weekends and holidays.
  • Late fees begin accruing the day after your due date, regardless of when your payment was mailed or submitted.

Online Payment Through Cobb Water's Website

Cobb County Water System operates its own online payment portal at cobbwater.org. You log in with your account number (found on your bill) and either create a new online account or use an existing one. The portal accepts payments via debit card, credit card, or bank account transfer, though credit card payments may carry a processing fee charged by the payment processor.

Payments submitted online before 5 p.m. Eastern Time typically post within one business day. If you submit a payment after 5 p.m., it enters the queue for the next business day. Weekends and holidays extend processing time, so a payment submitted Friday evening may not post until Tuesday. The system generates a confirmation number when ready after submission — save this for your records, as it proves the payment was received.

Automatic Bank Draft (ACH)

Setting up automatic payment through bank draft is the most reliable method for on-time payment. You authorize Cobb Water to pull funds directly from your checking or savings account on a date you choose — typically your due date or a few days before. The authorization form is available on the Cobb Water website or by calling their billing department at (770) 419-6000.

ACH payments post on the date you authorize them, with no processing delays. There is no fee for this method. Once set up, the payment recurs each billing cycle unless you cancel it. If your account balance is insufficient on the scheduled date, the draft may fail and trigger a returned-payment fee from both your bank and Cobb Water, so verify your balance before the draft date.

Mail Payments and Lockbox Processing

Mailing a check or money order to Cobb Water's lockbox is free but slow. The lockbox address appears on your bill; mail sent to this address enters a processing queue that typically takes seven to ten business days from the date received. The utility dates your payment from when it arrives at the lockbox, not when you mailed it, so a check mailed on the 20th but received on the 28th posts on the 28th.

Late fees begin the day after your due date. If your due date is the 15th and your check arrives on the 20th, you will owe a late fee even though you mailed it before the important date. To avoid this, mail payments at least ten business days before your due date. Keep a copy of the front and back of your check or the money order receipt as proof of payment in case there is a dispute.

Phone and In-Person Payment Options

You can pay by phone by calling Cobb Water's billing department at (770) 419-6000 during business hours (Monday through Friday, 8 a.m. to 5 p.m. Eastern Time). Phone payments require a debit card or bank account number and post within one to two business days. Some payment processors charge a convenience fee for phone payments; ask the representative before providing your payment information.

In-person payments at the Cobb County Water System office in Marietta post the same day if submitted before 4:30 p.m. Monday through Friday. The office is closed weekends, holidays, and during county government closures. Bring your bill or account number and a check, money order, or debit card. In-person payments avoid mail delays and processing queues, making them useful if your due date is within a few days.

What Happens After Your Payment Posts

Once your payment posts to your account, Cobb Water updates your balance within one to two business days. You can check your account status online through the same portal where you submitted payment, or by calling the billing department. Your next bill will reflect the payment and show your updated balance.

If you overpay your account, the credit carries forward to your next billing cycle. Cobb Water does not issue refunds for overpayments; instead, the credit reduces the amount due on your next bill. If you close your account and have a credit balance, you can request a refund by contacting the billing office in writing with your account number and forwarding address.

Late Fees and Service Interruption

Late fees begin accruing the day after your due date. Cobb Water's late fee structure varies, but typically ranges from a flat fee plus a percentage of the unpaid balance. The exact amount appears in your service agreement and on your bill. Paying late does not remove the late fee — it only stops additional fees from accruing.

If your account remains unpaid for a set period (usually 30 to 60 days past due, depending on your service agreement), Cobb Water may issue a notice of intent to discontinue service. Service can be shut off without further notice if payment is not received by the date stated in the discontinuation notice. Reconnection requires payment of all arrears plus a reconnection fee. If you cannot pay in full, contact the billing office to discuss payment arrangements before service is interrupted.

Frequently Asked Questions

How long does it take for a mailed check to post to my account?

Mail typically takes seven to ten business days from the date it arrives at the lockbox. The utility dates your payment from arrival, not from when you mailed it. To avoid late fees, mail at least ten business days before your due date.

Can I pay my Cobb Water bill with a credit card online?

Yes, the online portal accepts credit cards, but the payment processor charges a convenience fee (usually 2 to 3 percent of the payment amount). Debit card and bank account payments through the same portal carry no fee.

What happens if my automatic bank draft fails?

If your account has insufficient funds, the draft fails and your account falls behind. Both your bank and Cobb Water will charge a returned-payment fee. You remain responsible for the unpaid balance plus late fees. Contact the billing office when ready to arrange payment or set up a new draft date.

Can I get a refund if I overpay my water bill?

Cobb Water does not issue refunds for overpayments. The credit applies to your next bill instead. If you close your account with a remaining credit, you can request a refund by submitting a written request with your account number and forwarding address to the billing office.

What is the reconnection fee if my service is shut off?

Reconnection fees vary and are listed in your service agreement. Contact Cobb Water's billing department at (770) 419-6000 to confirm the current reconnection fee before your service is interrupted. You must pay all arrears plus the reconnection fee to restore service.